浆纱压出回潮率与上浆率间的关系

Relationship between the extrudation moisture regain of sized yarns and size pick-up

针对目前所用的浆纱压出回潮率和上浆率之间的关系式均为近似公式,且不适于预湿上浆工艺这一问题,分别建立了针对包括高压上浆在内的传统上浆工艺和预湿上浆工艺的浆纱压出回潮率与上浆率间的准确关系式,并对其进行了相应的分析。结果表明:当传统上浆和预湿上浆的浆纱压出回潮率以及浆槽中浆液质量分数相同时,预湿上浆必然导致浆纱上浆率的降低;随着浆液质量分数的增加,按近似关系式求得的浆纱压出回潮率的偏差率增大。

Due to the fact that the relationship between the extrudation moisture regain of sized yarns and size pick-up is expressed only by an approximate equation, and which is not suitable for prewetting sizing process, accurate equations to express the relationships between the extrudation moisture regain of sized yarns and size pick-up for traditional sizing process （including high-pressure sizing） and prewetting sizing are derived. When the prewetting sizing has the same extrudation moisture regain of sized yarns and the same size concentration as the traditional sizing process, prewetting sizing leads to lower size pick-up. The deviation of the extrudation moisture regain obtained by the approximate equation increases with increasing of size concentration.